We're all pleased with/at the news that you've been successful

[tzfujimino]

1. We're all pleased with the news that you've been successful.
2. We're all pleased at the news that you've been successful.
(I made these sentences above.)

Do they both work?
Are there any differences in meaning between them?

 

[emsr2d2]

1. We're all pleased with the news that you've been successful.
2. We're all pleased at the news that you've been successful.

(I made wrote these the sentences above.)

Do they both work? Are there any differences in meaning between them?

Assume that a change of preposition almost always changes the meaning, even if by only an infinitesimal amount. The more important questions are "Do I understand the sentence?" and "Does my reader/listener understand the sentence?"

 

[tzfujimino]

Thank you, emsr2d2.

I should have asked "Are there any significant differences in meaning between the two sentences?"

I'm so used to the expression "pleased with" that I'm not confident about the use of "pleased at" in #1.
Now I'm starting to think that maybe "pleased by" and "pleased about" work too.

 

[Tarheel]

I just realized that I don't use "pleased" very much. So what would I say? (See below.)

Congratulations!
I'm happy for you.
I'm delighted that you have done so well.

You can, of course, use "pleased" as you have.

 

[jutfrank]

Are there any differences in meaning between them?

The different prepositions give the sentences different nuances of meaning, yes.

Using with focuses on the connection between the feeling of satisfaction and the news. (Think about how we use 'with' in other ways to express a sense of togetherness, such as in I live with my wife.)

Using at focuses on the reaction of satisfaction experienced by hearing the news. (Think about how we use 'at' in other ways to express reactions, such as in She laughs at my jokes.)

I'm not confident about the use of "pleased at" in #1.

Well, it isn't a good example, in my opinion. Here's a very similar but much better one, which shows the sense of reaction more clearly:

She was stunned at the news.

Note that 'with' doesn't work here, since the idea is clearly about reaction. In the context of your original sentence, it seems to me that 'with' better expresses what you really mean to say.